Quote:
Originally Posted by Redneckstone
love to see this TSB never spotted that when I was logged into ford tech service, was it a early ohv? like gen 2
|
I was talking to a buddy about this (noisy OHV 4.0's) over the weekend and he remembered another issue. Ford kicked up a TSB to cover the late OHV's (possibly 98-00?) with a noise about identical to the wrist pin issue (soft knock, "marbling"), in fact, the root cause for both is about the same (engine assembly using parts with tolerances that are at extremities). Seems like Ford revised the pistons for the final years of the engine and in certain cases (tol's as noted earlier) the skirts slapped around in the cyl a bit. That would worry me. Ford told customers it's normal; I've never personally seen the inside of a high mile 4.0 that had the sound nor heard of an issue (ie, oil consumption) failure because of it, but if there were any I'd be all ears to hear details.